كتكوتي

proline has a secondary amino group called

• a-imino acid

• carboxyl group

• hydrogen atom

• R group

--------- and --------- are combined through peptide linkage

• carboxyl and amino

• Hydrogen atom and carboxyl

• carboxyl and R group

• carboxyl and carbon

all of the following is true about amino acid except:

• cannot form hydrogen or ionic bond

• they include alanine and valine

• they are hydrophobic

• they have a water like property

are important components of the active site of many enzyme

• cysteine and serine

• cysteine and tyrosine

• cysteine and glutamine

• proline and serine

aspartic and glutamic acid are proton donors

• true

• false

Histidine is a strong basic

• true

• false

Answer explanation

weakly basic

they cannot be synthesised in the body and humans must obtain them from food

• essential amino acid

• non-essential amino acid

• all amino acids

two mirror images of amino acids are termed

• enantiomers

• chiral carbon

• identical

• dextrorotatory

only D-amino acid are found in proteins

• true

• false

Answer explanation

L-amino acid

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